Keyboard



FIG. 1 is a perspective view of a keyboard showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a rear top right perspective view of the keyboard; and,

FIG. 9 is a rear bottom right perspective view of the keyboard.

The broken lines in the drawings illustrate portions of the keyboard that form no part of the claimed design. 

CLAIM The ornamental design for a keyboard, as shown and described. 